First page Back Continue Last page Overview Graphics
IP Addresses
Each packet has a source and destination address
Example: 192.168.15.48 (decimal notation)
11000000.101010000.00001111.00110000 (binary notation – four 8-bit parts – “octets”)
Boundaries: 0-255 for each octet
Try counting beyond 255 with 8 bits!
Notes:
There are some IP address ranges that are reserved for experimental/local use, and are not routable. This means that it's impossible to use them on the Internet, and they can be used only on local networks. Network Address Translation (NAT) can be used to allow hosts that use such reserved addresses to communicate with other hosts across the Internet.
The special addresses according to RFC1918 are:
10.0.0.0 – 10.255.255.255 (10/8 prefix)
172.16.0.0 – 172.31.255.255 (172.16/12 prefix)
192.168.0.0 – 192.168.255.255 (192.168/16 prefix)